For anyone that might be wondering about using an Alps GlidePoint trackpad with their IIGS, I'd like to say this thing seems to work pretty great. I picked up one off Amazon for $19.95 after deciding I wanted something that wasn't a ball-mouse type pointing device. It is an ADB device that I'm using plugged into an Apple Design Keyboard M2980 ADB bus and have had absolutely no problems with it in GS/OS. I point this out simply because I couldn't find much information on some of this hardware in conjunction with the Apple II series. Lots of stuff about the Macs, sort of like the SyQuest 88 MB SCSi with the 44 MB cartridge... seems to work great but I can't find much info. BTW, if you have info you can post I would be very happy to use it. Especially if you have info on the Apple IEEE-488 card that is not in German :)
Anyway, I haven't posted much in any Apple II forums but I had one back in the 80's and loved the thing, especially the Beagle Brothers, Wizards, Ultima stuff.